52 lines
1.6 KiB
Plaintext
52 lines
1.6 KiB
Plaintext
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#!/bin/bash
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# kernel-cleanup.sh - Remove obsolete packages and config files
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# {{ ansible_managed }}
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# Determine the active running kernel
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RUNNING_KERNEL="$( uname -v | awk '{ print $4 }' )"
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# Determine the list of installed kernels (latest is always last)
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INSTALLED_KERNELS=( $( dpkg -l | grep 'linux-image-[0-9]' | awk '{ print $3 }' ) )
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NUM_INSTALLED=${{ '{#' }}INSTALLED_KERNELS[@]}
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if [[ ${NUM_INSTALLED} -le 1 ]]; then
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echo "A single kernel is installed, aborting cleanly."
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exit 0
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fi
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LATEST_KERNEL="${INSTALLED_KERNELS[-1]}"
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if [[ ${LATEST_KERNEL} == ${RUNNING_KERNEL} ]]; then
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force="--allow-remove-essential"
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else
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force=""
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fi
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# Remove the latest kernel from the array
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NUM_REMOVABLE=$(( ${NUM_INSTALLED} - 1 ))
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REMOVABLE_KERNELS=( ${INSTALLED_KERNELS[@]:0:${NUM_REMOVABLE}} )
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PURGE_PACKAGES=()
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for KERNEL in ${REMOVABLE_KERNELS[@]}; do
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PURGE_PACKAGES+=( $( dpkg -l | grep ${KERNEL} | awk '{ print $2 }' ) )
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done
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# Override the "linux-check-removal" script
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mv /usr/bin/linux-check-removal /usr/bin/linux-check-removal.orig
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echo -e '#!/bin/sh\necho "Overriding default linux-check-removal script!"\nexit 0' > /usr/bin/linux-check-removal
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chmod +x /usr/bin/linux-check-removal
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# Remove the packages
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echo "Removing: ${PURGE_PACKAGES[@]}"
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apt-get purge --yes ${force} ${PURGE_PACKAGES[@]}
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# Restore the "linux-check-removal" script
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mv /usr/bin/linux-check-removal.orig /usr/bin/linux-check-removal
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# Make sure there is still a valid kernel installed (just in case something broke)
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if [[ $( dpkg -l | grep 'linux-image-[0-9]' | wc -l ) -lt 1 ]]; then
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echo "WARNING: NO KERNEL IS INSTALLED. THROWING ERROR AND ABORTING."
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exit 1
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fi
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exit 0
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